While wearing this helm, it will keep track of the amount of Gargoyles killed.
The 'Transform' option will change the player into a banshee for a short while.

Notes:

It can be changed back and forth to a mask of granite by using the 'Change look' function.
This helm has the same teleport options as the mask of granite.
This item can be reobtained from Diango's Toy Store in Draynor should you destroy it/lose it (at a cost of 25,000 coins), with the same progress as before.